Is the king cobra the only kind of snake that lays eggs in a nest?

The king cobra is the only species of snake that builds a nest on the forest floor, out of debris. Other species may dig 'nests' in the ground (short burrows to deposit their eggs in), or lay their eggs in abandoned rodent burrows, inside termite mounds, or under debris.

King cobras defend their nests, which is also unique among snakes. (Some other species of snakes will guard their eggs, but do not guard the area around them).